Crown Audio K2, K1 specification

“Y” Input: An on/off switch located on

the back panel between the input connectors which, when turned on, parallels the two input channels.

Indicators

TLC: A TLC (thermal level control) LED for each channel which turns on with a dim glow shortly before the ampliﬁer needs help dissipating heat.

Clip: An orange LED for each channel which turns on when distortion of any type becomes audible in the ampliﬁer output.

IOC: A yellow LED for each channel which serves as a distortion indicator. The IOC indi- cators include a pulse-stretching feature that helps make them more noticeable even with rapid transient signals

Signal: A green LED for each channel which ﬂashes dimly when a very low-level signal (as low as 10 mW) is present in the output. They ﬂash brightly when a louder signal (at least 1 watt) is present at the output.

Enable: A green LED that turns on when the ampliﬁer has been turned on and has power. When ﬁrst turned on, there will be a brief two- second delay while the ampliﬁer performs a quick turn-on diagnostic. Then the Enable indi- cator will turn on to its full brightness. If

no signal is present, the Enable indicator will switch to a dim level.

Input/Output

Input Connectors: One balanced ¼-inch (6.35-mm) phone jack and one 3-pin female XLR connector for each channel.

Input Stage: Input is electronically balanced and employs precision 1% resistors.

Input Impedance: Nominally 20 k ohms, bal- anced. Nominally 10 k ohms, unbalanced.

Output Connectors: Two sets of color-coded binding posts for banana plugs, spade lugs or bare wire (European models do not accept banana plugs.)

DC Output Offset: ±10 millivolts.

Output Signal

Stereo: Unbalanced, two-channel.

Bridge-Mono:Balanced, single-channel. Chan- nel 1 controls are active; Channel 2 should be turned down.

Protection

K-Series ampliﬁers are protected against shorted, open or mismatched loads; overloaded power supplies; excessive temperature, chain destruction phenomena, input overload damage and high-frequency blowups. They also protect loudspeakers from input/output DC, DC offset and turn-on/turn-off transients.

TLC protection circuitry protects the ampliﬁer from excessive heat by subtly and dynamically reducing the gain only when necessary to reduce heat levels. Transformer overheating (an extremely unlikely event) will result in a tempo- rary shutdown; when it has cooled to a safe temperature, the transformer will automatically reset itself. Controlled slew rate voltage ampli- ﬁers prevent RF burnouts, and input overload protection is provided by the input current limit.

Out-of-band low-pass and high-pass ﬁlters pro- tect the ampliﬁer and loads from subsonic fre- quencies below 8 Hz and ultrasonic frequencies above 30 kHz.

Turn On: State-of-the-art “soft start” feature prevents the ampliﬁer from drawing a large inrush current when it is ﬁrst turned on and no dangerous artifacts are produced by the ampli- ﬁer. (However it is recommended that all equip- ment ahead of the ampliﬁer be turned on ﬁrst since they may produce turn-on transients.)

Construction

Cast-aluminum front panel with durable ﬁnish and Lexan labels. Aluminum chassis with dura- ble black ﬁnish.

Cooling: High-performance passive convection cooling system allows the ampliﬁer to drive

2 ohm loads to high music sound levels (6 dB into clip) in a 40° C (104° F) ambient environ- ment .

Dimensions: Standard 19-inch (48.3-cm) rack mount width (EIA RS-310-B), 3.5 inches (8.9 cm) high and 16 inches (40.6 cm) deep behind front mounting surface.

Net Weight:

K1: 32 lb (14.6 kg).

K2: 38 lb (17.3 kg).

Shipping Weight:

K1: 38 lb (17.3 kg).

K2: 44 lb (20.0 kg).

Center of gravity approximately 6 inches (15.2 cm) behind front mounting surface.

Crown’s Three-Year, No-Fault, Fully Transferable Warranty

Crown offers a Three-Year, No-Fault, Fully Transferable Warranty for every new Crown ampli- ﬁer—an unsurpassed industry standard. With this unprecedented No-Fault protection, your new Crown ampliﬁer is warranted to meet or exceed original speciﬁcations for the ﬁrst three years of ownership. During this time, if your ampliﬁer fails, or does not perform to original speciﬁcations, it will be repaired or replaced at our expense. About the only things not covered by this warranty are those losses normally covered by insurance and those caused by intentional abuse. And the coverage is transferable, should you sell your ampliﬁer.

See your authorized Crown dealer for full warranty disclosure and details. For customers outside of the USA, please contact your authorized Crown distributor for warranty information or call 574-294-8200.

Crown International 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 TEL: 574-294-8200 FAX: 574-294-8FAX www.crownaudio.com

Speciﬁcations subject to change without prior notice. Latest information available at www.crownaudio.com.

Crown, Crown Audio, K2 and BCA are registered trademarks of Crown International. Other trademarks are the property of their respective owners. Printed in U.S.A.

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