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Classe Sigma Mono Power Amp

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The Sigma MONO is the reference design for the proprietary Classé amplifier platform introduced in the Delta series CA-D200 and Sigma AMP2 and AMP5 models. With completely separate chassis for each channel, the monaural amplifier architecture eliminates the possibility of crosstalk between channels and allows speaker cable lengths to be held to a minimum to minimize losses. It efficiently delivers a prodigious 350W into 8Ω and 700W into 4Ω, suitable for the most difficult speaker loads and critical listening applications.

Sigma MONO MONAURAL AMPLIFIER
All tests un-weighted and 20Hz – 20kHz measurement bandwidth used.
Frequency response 10Hz – 20kHz, -1dB into 4Ω
Output power 350W rms into 8Ω
700W rms into 4Ω
Harmonic Distortion <0.012% @ 1kHz driven to 1/8th power into 8Ω
Peak Output Voltage 151V peak to peak, 53.4V rms no load
151V peak to peak, 53.4V rms into 8Ω
Input Impedance 100kΩ Balanced / 50kΩ SE
Voltage gain 29 dB
Input level at clipping 1.8Vrms Balanced/SE
Intermodulation Distortion >80 dB below fundamental into 8Ω Balanced
Signal to Noise Ratio -109 dB at peak output into 8Ω (AES17)
Standby power consumption .5W @ 230 V
Rated power consumption 130W @ 1/8th power into 4Ω
Mains voltage 90V - 264V, 50/60Hz
Overall Dimensions Width: 17.00" (433mm)
Depth (excluding connectors): 14.57" (370mm)
Height: 3.75" (95mm)
Net weight 22.0 lb (10.00 kg)
Shipping weight 29.0 lb (13.18 kg)

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We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).

For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.

Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.

Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.

Classe Sigma Mono Power Amp




Nintronics offers generous trade in prices to help make your next upgrade as seamless as possible, while greatly reducing the overall price of your purchase. Depending upon the items involved, Nintronics will be happy to send out one of our nationwide installation engineers to collect your traded in items and unbox, setup and calibrate your new equipment.

Classe Sigma Mono Power Amp

"Please include age, condition, make, model and serial numbers of the units you wish to trade in. Please note if you have the original accessories, boxes, invoice etc... This will help with increasing your trade in value."




Nintronics Ltd, Unit 7, Martinfield Business Centre, Welwyn Garden City, AL7 1HG
Tel: 01707 320788 Email: sales@nintronics.co.uk

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