SKU: 33831518539

SPL CROSSOVER MK2 Active Analog 2-Way Crossover for Pro Audio & Hi-Fi Applications (Red)

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Description

SPL CROSSOVER MK2 Active Analog 2-Way Crossover for Pro Audio & Hi-Fi Applications (Red)The analog crossover in its second generation The second generation of the SPL Crossover features even more crossover frequencies and an extended range of functions making it the best and most versatile SPL crossover ever. The perfect integration of bass loudspeakers or subwoofers can be difficult. There are almost only digital crossovers for this purpose. But who wants to convert back to digital in an analog high end playback chain? Our analog

The analog crossover in its second generation
The second generation of the SPL Crossover features even more crossover frequencies and an extended range of functions – making it the best and most versatile SPL crossover ever.

The perfect integration of bass loudspeakers or subwoofers can be difficult. There are almost only digital crossovers for this purpose. But who wants to convert back to digital in an analog high-end playback chain? Our analog Crossover Mk2 sets the crossovers anew and rewards with outstanding listening pleasure – thanks to the SPL VOLTAiR technology.

Great design – a must have
Visually, the SPL Crossover Mk2 fits perfectly into the SPL HiFi line Professional Fidelity – and is of course available in the three basic colors black, red or silver.

Crossing over
The Crossover Mk2 is divided into two sections: The LOW PASS section for the bass loudspeaker or subwoofer (mono or stereo) and the HIGH PASS section for the top/main speakers. The crossover frequencies for the LOW PASS and HIGH PASS can be set individually from 20 Hz to 3,6 kHz.

X-FREQ
With the respective three-position switch X-FREQ, the frequency range for the LOW PASS or HIGH PASS can be pre-set.

The following three options are possible:

  • Switch position, top – 1,5 kHz to 3,6 kHz
  • Switch position, center – 300 Hz to 700 Hz
  • Switch position, bottom – 50 Hz to 120 Hz

X-OVER | Hz
The X-OVER | Hz switch features six switching positions. This switch is used to pre-set the crossover frequency of the LOW PASS or HIGH PASS. Depending on the pre-selection made with the X-FREQ switch, 18 different crossover frequencies can be set.

ROLL-OFF
The slope of the LOW PASS respectively HIGH PASS can be switched from 12 dB to 24 dB with the ROLL-OFF switch.

LOW CUT
In addition, there is also a low-cut filter. This filter frees both paths, the LOW PASS and HIGH PASS, from unwanted frequencies below 20 Hz. This means that the power amplifier does not have to amplify inaudible low frequencies and the loudspeaker is discharged.

In Phase
Audio signals should come from the top speakers and bass loudspeakers or subwoofers in phase. The Crossover MK2 offers variable phase control for this purpose.

PHASE
The three-position toggle switch PHASE can be used to activate phase control. The dedicated control is used to establish synchronization.

If the toggle switch PHASE is in the top position (VAR 0°), a value between 0° and 180° can be set using the control. If the toggle switch PHASE is in the top position (VAR -180°), a value between 0° and -180° can be set via the control, thus allowing a control range of 360°

If the phase control is not required, it can be switched off (OFF) and thus disappears completely from the signal path.

LP OUTPUT –  Would you like a bit more?
If you want to connect two bass loudspeakers or subwoofers (one for L and one for R), this switch should be set to stereo.

If you only use one bass loudspeaker or subwoofer, switch to mono. The crossover creates a mono signal of the Low frequencies and outputs it to both Low outputs (L + R).

HIGH PASS –  on or off?
If you prefer to run the top/main speakers full-range, you can switch off the HIGH PASS filter.

As long as you‘re having fun
The playback volume of the bass loudspeaker or subwoofer can be varied from -10 dB to +10 dB. In addition to the purely corrective adjustment of the speaker system, you can add more bass into recordings that lack low end. Happiness is when the bass kicks in.

Source of joy – balanced or unbalanced
Gold-plated RCA and XLR sockets are available as connections for each stereo input and stereo output. This allows the Crossover Mk2 to be integrated into any set-up without the need for additional adapters.

  • On the output side, the signal is always present at the RCA and XLR outputs.
  • On the input side, the INPUT switch is used to switch between the XLR and RCA inputs.

On
Crossover Mk2 can be switched on with the ON switch (switch is in the top position).

Everything under control – AMP CTL
The standby mode for up to four devices with 12V trigger input can be switched on and off via AMP CTL, together with the Crossover Mk2 (AMP CTL Out). This is especially useful for connecting power amplifiers. But also the standby mode of the Crossover Mk2 itself can be switched on and off by a preamplifier, such as the Director Mk2, Elector or the Phonitor x, via AMP CTL (AMP CTL In).

Sounds good
With all devices of the Professional Fidelity series we develop not only according to plan, but also by ear. Many important components are installed on the circuit boards using Through-hole technology. This way we can ensure that we can use the best sounding components.

Specifications

Analog Inputs & Output: XLR (balanced) and RCA

  • Maximum input and output level: 32.5 dB
  • Input impedance (RCA): 20 kΩ
  • Input impedance (XLR): 20 kΩ
  • Output impedance: 75 Ω
  • Common-Mode Rejection Ratio (XLR): -82 dBu
  • Frequency range (-3 dB): 10 Hz–100 kHz
  • Crosstalk (1 kHz): -70 dB
  • THD+N (0 dBu, 1 kHz, HIGH PASS Output): 0.0008 %
  • THD+N (0 dBu, 30 Hz, LOW PASS Output): 0.0009 %
  • Noise (A-weighted, HIGH PASS Output): -106 dBu
  • Noise (A-weighted, LOW PASS Output): -105 dBu
  • Dynamic range (HIGH PASS Output): 138 dB
  • Dynamic range (LOW PASS Output): 137 dB

Internal Linear Power Supply with Shielded Toroidal Transformer

  • Operating voltage for analog audio: +/- 60 V
  • Operating voltage for relays and LEDs: + 12 V

Mains Power Supply

  • Mains voltage (selectable, see fuse chamber): 230 V AC / 50; 115 V AC / 60 Hz
  • Fuse for 230 V: T 0,5 A
  • Fuse for 115 V: T 1 A
  • Power consumption: max. 50 VA
  • Stand-by power consumption: < 0.3 W

Dimensions & Weight

  • W x H x D (width x height incl. feet x depth): 278 x 100 x 300 mm / 11 x 4 x 11.81 inch
  • Unit weight: 4.6 kg / 10.14 lbs
  • Shipping weight (incl. packaging): 5.85 kg / 12.89 lbs
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 33831518539

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4.5 ★★★★★
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Product Reviews
T
Verified Purchase
Terry Tucker
Natrona Heights, US
★★★★★ 5
Astoundingly Good
Format: Kindle
This is a must have book. It is, beyond a doubt, the best book I have read on military strategy. The author is clear, provides case examples, and more importantly makes this "readable." I retired with 24 years on active duty and spent 15 more working in PMC's working in austere and conflict environments. THIS book is long overdue.
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Reviewed in the United States on April 6, 2014
R
Verified Purchase
Rachel Gollub
Massapequa, US
★★★★★ 5
Thoughtful and deeply insightful
Format: Kindle
Browse not only goes over the current state of the US military in detail, but also ends with concrete and manageable suggestions to fix the major problems. Really good book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 19, 2025
T
Verified Purchase
Thomas M. Magee
Belleville, US
★★★★★ 5
Eye Opening, Thought Provoking and Scary
Format: Hardcover
This book will grab your attention, keep you spell bound and scare the heck out of you. The author was the Chief of Staff under Senator McCain for the Senate Armed Services Committee. This book is about new technology in the defense field and our inability to deal with it. The new technology comes in many forms. There now are missiles that fly 2 or 3 times faster than what is available now. The missiles can reach out many many thousands of miles more, enough to hit America from the other side of the world. Now computers are recently coming out on the market which are smaller and 2 or 3 times faster than previous computers. All of that combines to radically speed up the decision time for war operations. The author calls it the kill chain. The change doesn't stop there. The tactics used by our competitors has radically changed warfare. The examples the author uses comes from Russia. He reviews their invasion of "Little Green Men" in the Ukraine turned warfare upside down. They infiltrated troops into the land. Then they merged with dissent forces already in the country. Then the war stars, but on a small scale. Before you know it Russia grabbed Crimea and neutralized a huge slice of the Ukraine. That was the first time since WWII where borders changed. The last part of the book is the most scary. He relies on his experience in Congress. He cites several examples to show where the bureaucracy is incapable of change. The pressures of on going operations, turf wars, political desires to protect home based companies all have immobilized the bureaucracy. He also cites the case of the Army trying to get a new side arm. It took 17 million to test an off the shelf pistol. The case showed how fear of risk has layered on level after level of control and check. Those levels of course adds costs. That was just one weapons program. Can you imagine what the cost is as you expand that out to really big ticket things like carriers. It leads to the Pentagon to continue buying weapons it doesn't need and use tactics which really come out of WWII. As the Pentagon games go on the world's armies change. I think his point about the bureaucracy caught in a never ending loop also might explain other troubles across the globe. That leads to the scary part. Is the country ready for the future? Will it defend the nation for the future? If it isn't 9/11 might be a match strike in comparison.
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Reviewed in the United States on June 11, 2020
S
Verified Purchase
Steve Dietrich
Draper, US
★★★★★ 4
Eyes Wide Open (with a few omissions)
Format: Audiobook
Thought provoking and great insights but with a few material omissions. As others have noted this is an extremely thought provoking book. Perhaps the most disturbing is the discussion of war gaming a war with China and in most every Chinese initiated war China wins. A close runner-up was the lack of widespread commitment of other senate members to be as fully informed as possible on the military side of military affairs including budgets for specific projects. It's hard to document the claim that two issues were serious omissions but I think there were. There are seemingly minor details that are important Robert McNamara worked for Ford not GM. This is important for decisions at Ford by McNamara's accolates took Ford down to one of its smallest market share of the postwar years. McNamara gave Ford the Falcon , his successors brought out the Mustang. His arrogance cost billions and thousands of lives. McCain recognized the political folly of the initial "leased" Boeing Replacement Tanker Program but that is not discussed. Neither is the continuing debacle of the program, felony convictions/pleas of top Boeing execs and the Pentagon's civilian chief of procurement all associated with the ill-fated tanker program. Declared a near emergency need at the turn of the century, twenty later the tankers can not perform the mission and tens of billions over budget. To put the Tanker Program debacle in perspective, In July 1962 the US achieved its first orbital space flight and its first Moon landing 7 years later. In contrast the replacement tanker program has been in process Boeing was awarded the contract in 2002 , 19 years later and the tankers are not fully operational. Along the way both Boeing and a top civilian dod official did some hard time on felony corruption convictions/pleas. The author notes that in the event of an outbreak of war between the US and China the US ships must get far offshore to have even a chance of survival, well beyond the range of existing carrier based aircraft to attack Chinese forces. The lack of tankers, short range attack aircraft and light loads prevents the Navy from going deep inland. Part of the problem is that the Navy was induced to scrap the long range, extremely deadly F-14B and F-14X and replace them with the slower, shorter range , less carrying capacity F-18s (also made by Boeing) . The Navy had available at the time the F-14X upgrade program which would have converted the F-14 to an even more deadly fighter / bomber and equipped them with a follow-on to the Phoenix missiles, so badly needed to defend the fleet against airborne launched cruise missiles. In addition there were further upgrades in the works to give the Phoenix missiles extremely valuable capabilities. A further indication of the suspicious pattern is that DOD required that all F-14 tooling and parts be destroyed. The claim was made that the F-14s were maintenance hogs. Partly true but largely fixed with the F-14X digital conversion and new engines. While the maintenance hours per flight hour were problematical, when looked at in the big picture they were a rounding error in the 6,000 or so sailors in the Battle Group working 10-15 hour days and the thousands onshore supporting the effort. Does this matter, well yesterday the Chinese ran a practice attack on a US carrier as about 15 aircraft approached within 250 nautical miles of the carrier. Most certainly within range to launch enough hypersonic cruise missiles to virtually assure the carrier would be taken out of action or sent to the bottom of the ocean. As the author notes today's strategy requires that the carriers flee the area and standoff about 1,000 miles. Faster, much longer range F-14x aircraft with the next generation Phoenix would significantly reduce this threat. They would also do the same against large Russian aircraft carrying many cruise missiles. The F-35s will help overcome this deficiency but until they are fully operational and our Naval tanker capabilities redeveloped US capabilities are seriously compromised. The author makes many great observations regarding deficiencies in procurement management, in the Pentagon , Congress and White House. Examples discussed include the Army's failed attempt to acquire a new pistol. The 500 page request for proposals and flawed competition would be a joke were in not for the fact that the taxpayers precious dollars were wasted in the failed effort. An illustration of how perverted the situation has become was illustrated today with a note the the US Air Force had issued an RFP for a "modesty curtain" to be installed on our ancient B-52's because there were now female personnel flying missions. This is a need that should be solvable by a few individuals over a bottle of wine who would probably come up with better ideas, reviewed by an engineer on Monday and perhaps fabricated in one of the base shops. As others have noted it was USAF Col John Boyd who revolutionized the air to air combat, was shunned by top Brass while at the Pentagon and left to his own devices prepared his famous day long lecture on Winning and Loosing Wars that in turn helped rewrite the USMC land battle doctrine. Most all of this work done out of sight of his "leaders" . The author might have also given credit to leaders like Admiral Tom Connolly who sacrificed his career to save Naval aviation from the terminally flawed F-111B as an example of the character and courage needed in the Pentagon, Congress and the White House today and into the future. The author's descriptions of the challenges posed by an aggressive and expansive China should be taken to heart by every American. Unless we stop treating military procurement as a Chicago like spoils system and manage both what we buy and what we pay for it we are inviting Chinese military challenges and placing an even greater financial millstone around the necks of American taxpayers and their future generations. Overall , not perfect but a very important must read
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2021
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 5
Add this to every DoD Reading List!
Format: Kindle
There were so many great excerpts throughout the book that my highlights filled 16 pages in MS Word. This is a must read for all Pentagon personnel, those in operational commands, the acquisition community, and defense industry. Chris' insights as McCain's advisor were invaluable to understand the nuances and competing incentives of the DoD, industry, and Congressional perspectives. "The problem is that America is playing a losing game. Over many decades we have built our military around small numbers of large, expensive, exquisite, heavily manned, and hard to replace platforms that struggle to close the kill chain as one battle network. China, meanwhile, has built large numbers of multi million dollar weapons to find and attack America’s small numbers of exponentially more expensive military platforms." "It requires a sweeping redesign of the American military: from a military built around small numbers of large, expensive, exquisite, heavily manned, and hard to replace platforms to a military built around large numbers of smaller, lower cost, expendable, and highly autonomous machines." "New technologies alone will not save us. We need new thinking — an ambitious effort to reimagine the ends, ways, and means of US military power, as well as the role of our allies in this effort — to succeed in a future world where America’s military superiority will likely erode further if China’s military technological development continues."
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2020

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