Stax
SRM-400S Headphone Amplifier

AED 5,475.00 (Inc. Tax)

(Price Per Unit)
Free delivery on orders above AED 500 in UAE.

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Driver unit for electrostatic earspeakers

Middle-class semiconductor driver unit is renewed. New DC amplifier which FET are installed in all stages.

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Overview

STAX introduces a new semiconductor driver unit SRM-400S, the successor model of SRM-353X.
STAX custom-made low noise DUAL FET is installed on First Stage. And FET is also installed on Last Stage. The characteristics of right FET and left FET are measured strictly. Selected FET are installed as well as SRM-700S. SRM-400S succeeds to the design and the manufacturing method of the high end model SRM-700S, the amplifier which FET are installed in all stages.

In addition to the conventional power transformer for the high voltage circuit, the newly designed power transformer with the winding for the low voltage circuit is installed in SRM-400S. The low voltage winding enables to improve the power efficiency and achieve further power saving and better sound quality than the conventional driver units such as SRM-353X.

The new chassis which is more rigid than the conventional model is installed. The chassis has a hybrid structure using a lot of non-magnetic aluminum and further reduces the effect of the environmental noise factors such as vibrations. The inputs are RCA and XLR, the mutual exclusion inputs. The custom made concentric dual volume knob which is common to STAX products and RCA PARALLEL OUT functions are installed same as the conventional driver units. All electric components are strictly selected considering the environment. Also the sound quality and the performance is improved. The complete DC amplifier configuration that the signal circuit includes no coupling condensers is one of the biggest traditional features.

SRM-400S takes over the high resolution sound which is unique to the semiconductor circuit and dynamic low range sound reproduction. Simultaneously, the good sound balance is further pursued than SRM-353X. From the low range to the high range, the sound of each range is well harmonized. Not only for the combination with the advanced lambda series, SRM-400S is also ideal for the upgrading from the entry level SRS-3100. This is the promising new model which covers from beginners to intermediates among the renewed driver unit lineup.

- New semiconductor driver with J-FET in the amplification stage. The custom-made, low-noise dual FET is low-noise.
- The power transistor array with effective heat dissipation through a large-sized heat sink
- Hand selected matching FET
- High-definition film capacitors are used
- Bypass volume control switch
- Volume control is EMI shielded
- Switchable RCA and XLR inputs. RCA parallel out.
- The newly developed large-sized aluminum insulator combined with new vibration-proof material and high frictional coefficient (grip power) have been employed.
Type: All-stage FET configuration DC amplification driver unit
Frequency response: DC – 100kHz (with one SR-009S)
Gain: 60dB
Harmonic distortion: 0.01% or less (1kHz/100Vrms output)
Input impedance: 50kΩ (RCA), 50kΩx 2 (XLR)
Maximum output voltage: 450Vrms (1kHz)
Bias voltage: PRO 580V
Operating temperature / humidity: 0 to 35 degrees C / less than 90% (non condensing)
Input terminal: RCA x 1, XLR x 1
Output: RCA parallel output terminal
Power consumption: 46W
Dimension: 240W x 103 H x 393 D mm (maximum protruding portion included)
Weight: 6.3kg

Orders ship Sunday through Friday from our offices in Dubai, UAE.

In-stock products typically ship within 48 hours and should be expected to arrive in 3-4 business days. Orders outside of the UAE should be expected to arrive in 5-7 business days.

Pre-order and backorder products will state the approximate delivery timeline beside the Add To Cart button.

If you would like to place a custom order, chat with our specialists for a guided shopping experience. Once your order has been placed, a timeline will be provided depending on your order details.

- Free delivery within the UAE
- Shipping charges will be calculated upon checkout for orders outside of the UAE (Bahrain, Oman, Kuwait, Saudi Arabia & Qatar).
- Taxes and duties are calculated according to the applicable laws of the state or country an item is shipped to and are the customer's responsibility.

For additional information on shipping and our exchange & return policy visit our help center.

Installation charges are applicable and can be paid upon delivery for our clients based in Dubai.

- Installation Charges: AED 450 Per Hour
- Speaker Cables: AED 32 Per Meter
- Trunking: AED 10 Per Meter

For clients based outside of the UAE, please contact our specialists and we will share an estimate based on your requirements.

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