Harman Kardon Citation 7.1 THX 4 CH AMLIFIER 150 W x 4 BRIDGEABLE

I'm selling my second Harman Kardon Citation 7.1. if you are interested you can contact me on phone or by email.

Phone number: 403-280-4160 or 403-816-7228

Email: [email protected] or [email protected]

I have 2 of them the price is $990.00 for each. They work grate, sounds and looks beautiful.

OWNERS MANUAL CAN BE DOWNLOADED FREE FROM THE INTERNET.

http://www.audioreview.com/cat/amplification/amplifiers/citation/7-1/prd_115649_1583crx.aspx

SPECIFICATIONS:

User-Configurable Outputs

The Citation¨ 7.1 may be used as a four, three or two-channel amplifier, with audiophile quality in all configurations.

This flexibility permits you to configure power levels to meet specific system requirements upon initial installation and in later system modifications.

High Current Design

Delivers full power to speakers even when matched with complex impedance loads from various speaker configurations.

Low Negative Feedback

Improved sonic quality with almost total freedom from TIM (transient intermodulation distortion), THD (total harmonic distortion) and IMD (intermodulation distortion).

Quad Power Supply

Four (4) separate power supplies, one for each output channel, eliminate crosstalk among channels and provide the highest possible performance in bridged modes.

Power-up Sequencing

When controlled by the remote turn-on system in the 5.0 AV Controller, 7.1 Multi-channel Power Amplifiers in multiple amplifier systems turn on sequentially, each at a slightly different time, reducing power surges in a home's electrical system.

Ultrawide Bandwidth Design

Delivers all the subtleties of the source material, even inaudible harmonics that contribute to sonic performance. A Citation
design and engineering hallmark.

Oversize Heat Sinks

Fan-free convection cooling assures high system reliability and quiet operation.

THX¨ Certified

The Citation 7.1 Multichannel Power Amplifier meets or exceeds THX TM standards for sonic performance and is compatible with other THX certified components.

General Description High current, multichannel audio power

amplifier, configurable for four, three or two-channel output. THX Certified.

Power Output 4 x 150 watts @ 8 Ohms, 4 x 240 watts

@ 4 Ohms

2 x 150 watts + 1 x 450 watts @ 8 Ohms

2 x 450 watts @ 8 Ohms bridged

FTC: 20 Hz - 20 kHz, .03% THD, All channels driven. 

HCC 130 Amps/channel in dual mono mode

Frequency Response < 3 Hz - 200 kHz ±3 dB at rated output

THD/IMD Less than 0.03% at rated output

Power Bandwidth 5 Hz - 130 kHz

Input Impedance 22k Ohms

Input Sensitivity 1.1 volts for rated output

Dimensions (HxWxD) 7 1/2 x 17 15/16 x 17 1/2"

191 x 456 x 445 mm

Weight 75 lbs / 34 kg

Power Requirements 120/230VAC, 50 - 60 Hz; 2500 watts,

maximum

Shipping will be paid by buyer.
Shipped with factory double-box and packing.
Payment by PayPal with shipping ONLY to your confirmed/verified address.

Steve Mantz of Zed audio was the one who designed this amp. Here is what he had to say:

Steve Mantz, now with Zed Audio, was instrumental in the Citation 5.1 and 7.1 amp creation:

"We did design and build the Citation 7.1 and the smaller 5.1. We built a lot of these for Harman International. The amplifiers are flat from DC to 270KHz where the response is about 1dB down. Harman wanted this silly specification, why I do not know because we are not bats and cannot hear that high. The original specification was that they wanted the amplifier to go out to 600KHz, but the first prototypes were NOT happy out there and so we 'compromised' at just under 300KHz.

Each channel uses 10 Toshiba 20MHz output devices with a theoretical dissipation of 1,500 watts. The circuitry is fully complementary from input to output and it has some very unique features. Each channel has 6 power supplies which are separate from the other channels. The only common item between channels is the power transformer, which is a 2.2Kw toroid. This 2.2Kw rating is at 25 deg C and it can put out upwards of 3Kw at higher temperatures.

The input complementary differential pairs are driven by temperature compensated constant current sources, which ensure almost zero drift of the DC conditions with each channel. These are also cascode connected for maximum bandwidth. The main gain stage is also cascoded for increased bandwidth and is also Darlington configured for high current gain.

The output stage is a triple Darlington with ultra fast turn off delay. The main power emitter resistors are non inductive types. No coils are used in the speaker circuit and the amplifier is stable into reactive loads with a phase angle of over 45 degrees. It has the usual plethora of protection circuits which by the way are not in the audio path. The amplifier can be turned on with a remote trigger or by the rocker switch on the rear. It can be changed to run from 100v to 240 AC 50/60Hz.

I have the last two production amplifiers at home, one of which I use in my own system for the subs. I run it in bridge mode into a 2 ohm load, and I get out 1Kw per pair of bridged channels. I did modify the protection circuit to allow me to run each channel into 1 ohm!

I have used the amplifier for 8 years now and it has run flawlessly." - Steve Mantz