Yamaha CA-2010

 Special Features of the CA-2010

DC Power Amplification with Switched Class A and Class B Operation

The power amplifier section makes true DC performance (to zero Hz) available, featuring ultra low distortion first stage Yamaha dual-FET differential amplification, parallel push-pull circuitry and SEPP output, with choice of Class A abd Class B operation at equivalent volume levels.

Superb Phono Equalizer Amplifier

The equalizer uses specially matched Yamaha low noise FETs in a differential amplifier first stage and features complementary SEPP output stage configuration to give an S/N of 96 dB and phono dynamic range up to 310 mV and RIAA deviation within ±0,2 dB

Ultra Low Noise MC Head-Amp IC

This offers S/N comparable with that obtained by conventional equalizer amplifiers for high output MM cartridges. Switching between MC and MM cartridge is on the front panel.

 Low Noise, Low Distortion Tone Control Amp

First stage differential FET amplifier and complementary SEPP output stage in the NF-type tone controls gives extremely low noise and distortion.

Wide Range Peak-Level Meters

In addition to their calibration in dB, these meters offer independent readings of output power in Watts (for 8 Ω speakers) and of the Rec Out output

Extremely Stable Power Supply Section

Two, 22,000 μF electrolytic capacitors and massive mains transformer give stable power supplies.

A Host of Other Important Features

These include relay-operated speaker protection, improved S/N due to four-gang volume control, a full range of accessory circuits, and the functional beauty of Yamaha design.

Filters

The filters circuits of the CA-2010 offer a choice of Subsonic and High filters. Both provide very steep attenuation curves with a slope of 12 dB/octave. This sharp slope is achieved with extremely low distortion so that there is minimum degradation of tonal quality in the important mid-range frequencies.

The Subsonic Filter operating below 15 Hz prevents the amplification of ultra low frequency signals, arising from warped or eccentric records, from giving rise to cross-modulation distortion (general lack of clarity), and protects the speakers from overloads. Since the filter has virtually, no effect on audible frequencies above 25 Hz, it can be left ON permanently with no effect on normal audition.

The High Filter operates at frequencies above 10 kHz, and is used to cut out unwanted tape hiss and record scratch. It should not be used unnecessarily.

Specifications

Minimum Power Output. Continuous RMS Power (both channels driven at rated 0,03% THD)

20 to 20,000 Hz : 120 W per channel into 8 Ω (Class B); 30 W per channel into 8Ω (Class A)

At 1 kHz : 125 W per channel into 8 Ω (Class B)

Signal-to-noise Ratio (IHF A network)

Phono 1 (MM), Phono 2 : 96 dB (for 10 mV, shorted)

Phono 1 (MC) : 85 dB (for 50 Ω, shorted)

Tuner, Aux : 100 dB

Main : 118 dB

Residual Noise : Less than 70 μV

Total Harmonic Distortion (20 Hz to 20 kHz)

Phono 1 (MM), 2 to Rec Out : Less than 0,003% , 5 V output

Phono 1 (MC) to Rec Out : Less than 0,03% , 3 V output

Tunerm Aux to Pre Out : Less than 0,005% , 3 V output

Main in to Sp Out

Class A : Less than 0,005% into 8Ω , 15 W

Class B : Less than 0,01% into 8Ω , 60 W

Tuner to Sp Out (Class B) : Less than 0,01% into 8 Ω , 60 W

Input Sensitivity/Impedance

Phono 1 (MM): 2mV/47, 68 ,100 kΩ

Phono 1 (MC) : 50 μV/47 kΩ

Phono 2 : 2 mV/47 kΩ

Tuner, Aux : 120 mV/50 kΩ

Main in Terminals : 1 V/50 kΩ

Output Level/Impedance

Rec Out terminals : 120 mV/600 Ω (rated); 18,6 V (max. at 1 kHz, 0,2% distortion)

Pre Out terminals : 1 V/500 Ω (rated); 7 V (max. at 1 kHz, 0,02% distortion)

Frequency Response

Phono 1, 2 RIAA deviation : ± 0,2 dB (MM/MC)

Tuner to Pre Out terminals : 5 Hz to 100 kHz, +0, -1 dB

Tuner to SP Out terminals : 5 Hz to 50 kHz, +0, -1 dB (8 Ω load)

IM Distortion : 0,03%, 250 mW to 120 W (Aux to Sp Out )

Noise-Distortion Clearance Range (0,1% THD)

Phono to Sp Out : 0,1W to 120 W (Vol at -20); 4 mW to 120 W (Vol at -40)

Damping factor at 1 kHz : Better than 45 into 8 Ω

Max Input Levels

Phono 1 (MM) , 2 : 310 mV (at 1 kHz, 0,02% distortion)

Phono 1 (MC) : 7,5 mV (at 1 kHz, 0,02% distortion)

Tuner, Aux : 20 V (at 1 kHz, 0,02% distortion)

Power Bandwidth into 8 Ω, 0,03% distortion

Class A operation : 10 Hz to 70 kHz (15 W output)

Class B operation : 10 Hz to 50 kHz (60 W output)

Filters

Subsonic : fc = 15 Hz, -12 dB/octave

High : fc =10 kHz, -12 dB/octave

Tone control characteristics

Bass Turnover frequencies : 125 Hz and 500 Hz

Bass Boost/Cut : ±10 dB at 20 Hz (for 500 Hz)

Treble Turnover frequencies : 2,5 kHz and 8 kHz

Treble Boost/Cut : ±10 dB at 20 kHz (for 2,5 kHz)

Meters

Rise Time : 100 μsec

Decay Time : 0,95 sec

Meter Range : -50 dB to +5 dB (1 mW to 316 W into 8 Ω)

Power Supplies: AC 120 V, 50 Hz (USA); AC 110 -130, 220 - 240 V 50/60 Hz (other)

Power Consumption (nominal): 450 W 550 VA (USA); 900 W (other)

Dimensions (W x H x D): 461 x 170 x 360 mm (18-1/8” x 6-11/16” x 14-2/5”)

Weight: 20 kg (44 lbs)