Accuphase E-213

Commentary

E-200 series integrated amplifier.

Both the preamplifier and power amplifier are equipped with ACPHASE's unique MCS (Multiple Circuit Summing-up) circuit to improve various characteristics such as S/N ratio and distortion factor.
The the MCS circuit of the power amplifier section, the same signal is input to each of two independent amplifier circuits, and the feedback signal is also input in the same way to synthesize the amplified output signal.
The preamp section (line amplifier) is not only a part of the amplifier circuit but also a complete MCS circuit in which amplifiers are arranged in parallel. The improvement in S/N ratio by the MCS circuit is theoretically 3 dB when two parallel amplifiers are used.

A multi-emitter type power transistor for high-power audio is used as the output device. This device is composed of parallel push-pull and attached to a large heat sink for heat radiation processing.

The power amplifier section uses a current feedback amplifier circuit for amplification.
The current feedback amplifier circuit feeds back the output signal in the form of a current. In this circuit, phase rotation does not occur and phase compensation is hardly necessary. Therefore, various characteristics can be greatly improved with a small amount of NFB. In addition, the frequency characteristics hardly change depending on the gain.

A logic relay control method is used for signal switching.
The relay is a closed-type relay for the communication industry. The contact is a gold-plated cross-bar twin type with low contact resistance and high durability.

The tone control uses a fully additive active filter system.
In this method, the original flat signal passes straight through, and the characteristics are made as necessary to add or subtract from the flat signal.

A large transformer of approximately 400 VA is used for the power supply. This transformer is fixed to the case using a filler with excellent heat conduction and anti-vibration effect, and the external influence is blocked.
The aluminum electrolytic capacitor for the filter is equipped with 2 large capacity types of 22,000 μ F.

It is equipped with an EXT-PRE switch and a power amplifier input terminal to separate the preamplifier and power amplifier for use as an independent power amplifier.

Equipped with a large speaker terminal.

Equipped with an analog peak power meter.

The volume is designed with an emphasis on sound quality.

High carbon cast iron insulator is mounted on the leg part.

Equipped with a compensator function, you can increase the bass range at low volume.

It comes with a wireless remote control that can adjust the volume and switch the input selector.

An additional option board is available for digital input and playback of analog records.
The E-213 is available in three types : the DAC-10 digital input board, the AD-9 analog input board, and the LINE-9 line input board. In addition, the AD-10 analog input board and the LINE-10 line input board can also be used.

The DAC-10 is an MDS (multiple ⊿∑) D/A converter equipped with coaxial and optical fiber input terminals.
The AD-9 is a high-gain equalizer whose internal DIP switch allows MM/MC switching, MC impedance and subsonic filter ON/OFF settings.
The line input board LINE-9 is an unbalanced general high-level input terminal.

Model Rating

Type	Pre-main amplifier
Rated continuous average output (both channel operation, 20 Hz to 20 kHz)	115W/ch (4 Ω) 105W/ch (6 Ω) 90W/ch (8 Ω)
Total harmonic distortion factor (both channel operation, 20 Hz to 20 kHz)	0.04% (4 Ω ~ 16 Ω Load)
IM distortion factor	0.01%
Frequency characteristic	Power input: 20 Hz ~ 20 kHz + 0 -0.2 dB (at rated continuous average output) 2 Hz ~ 150 kHz + 0 -3.0 dB at 1W Output High Level input: 20 Hz ~ 20 kHz + 0 -0.2 dB (at rated continuous average output)
Damping factor	100 (8 Ω load, 50 Hz)
Input Sensitivity / Impedance (Rated Output / EIA1W Output)	High Level input : 213mV/22.5mV/20k Ω Balanced input : 213mV/22.5mV/40k Ω Main input : 1.07V/113mV/20k Ω
Gain	High Level input - output:42dB Power input - output:28dB
S/N	Input Short (A-At rated output / EIA High Level input:110dB/81dB Balanced input:92dB/81dB Main input:123dB/100dB
Tone control	Bass (300 Hz) + / - 10 dB (50 Hz) High tone (3 kHz) : ± 10 dB (20 kHz)
Loudness compensator	+ 6 dB (200 Hz, Volume -30dB)
Attenuator	-20dB
Power meter	Logarithmic compression type peak level display, output dB /% display
Load impedance	4 Ω ~ 16 Ω
Headphone port	Applicable Impedance : 8 Ω ~ 100 Ω
Pwer	100 VAC, 50Hz/60Hz
Power consumption	43W (no input) 230W (Electrical Appliance and Material Control Law) 345W (at 8 Ω load rated output)
Maximum external dimensions	Width 475x Height 150x Depth 422 mm
Weight	18.8kg
Attachment	Remote Commander RC-23 AC power cord
Attached Remote Commander RC-23
Remote control system	Infrared pulse system
Pwer	3 VDC, 2 AA batteries are used.
Maximum external dimensions	45 mm wide x 136 mm high x 18 mm deep
Weight	85g (including dry batteries)
Optional Board Sold Separately
Digital Input Board DAC-10 (¥ 50,000)
Sampling frequency	32 kHz to 96 kHz, 24 bits
Analog Disk Input Board AD-9 (¥ 30,000)
Gain	MM:36dB MC:62dB
Input impedance	MM : 47k Ω MC : 10 Ω / 30 Ω / 100 Ω Switching
Line Input Board LINE-9 (¥ 6,000)