STAX - SR-L300

The first SR-Lambda series was introduced 36 years ago and it has further developed into a new-generation SR-Lambda with its newly designed enclosure - the new SR-L300 advanced Lambda series Earspeaker.

TOP QUALITY SOUND ELEMENT
Hand-selected thin-film diaphragm as well as tough stainless fixed electrodes have been employed for the SR-L300. Thus, rich deep bass response, delicate high frequency, and soothing mid-range has been achieved in a balanced manner.

SLIDE TYPE HEADBAND ASSEMBLY
The headband (ARC) assembly of the SR-L300 is equipped with step-less slider mechanism for head pad height adjustment.

NEW LOW CAPACITANCE OFC WIDE CABLE
OFC cable has been employed for the core wires. The entire cable is then arranged in a flat, WIDE format configuration to lower the capacitance between each wire and finished with the most suitable structure to drive the earspeaker.

NEW HIGH-QUALITY SYNTHETIC LEATHER EARPADS:
The new earpad design is carefully crafted with high-quality synthetic leather for utmost comfort for hours of music enjoyment as well as sound performance.

SR-L300 SPECIFICATIONS

• Type: Push-Pull electrostatic oval sound element, Open-Air type enclosure
• Frequency Response: 7 - 41,000Hz
• Capacitance: 110pF (including cable)
• Sensitivity: 101dB / 100V r.m.s. 1 kHz
• Bias Voltage: 580V DC
• Left & Right Channel Identification: 'L' and 'R' indicated on the arc assembly, solid line (left) and dotted line (right) on cable
• Ear Pads: High-quality synthetic leather
• Cable: OFC parallel 6-strand, low-capacity wide cable, 2.5m full length
• Ambient Temperature & Humidity: 0 to 35ºC / 90% max. without condensation
• Weight: 11.4oz without cable / 15.8oz with cable

Specifications and appearance are subject to change for improvement.

STAX - SRM-400S

Middle-class semiconductor driver unit is renewed.

New DC amplifier which FET are installed in all stages.

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.

SRM-400S Specifications

• Type: All-stage FET configuration DC amplification driver unit
• Frequency response: DC – 90kHz (with one SR-L500 MK2)
• Gain: 60dB
• Harmonic distortion: 0.01% or less (1kHz/100Vrms output)
• Input impedance: 50kΩ (RCA), 50kΩx 2 (XLR)
• Maximum output voltage: 400Vrms (1kHz)
• Bias voltage: DC 580V
• Operating temperature / humidity: 0 to 35 degrees C / less than 90% (non condensing)
• Input terminal: RCA x 1, XLR x 1(mutual exclusion input)
• Output: RCA parallel output terminal
• Power consumption: 30W
• Power Supply: 120 V / 50-60Hz
• Dimension: 195 (W) x 102 (H) x 376 (D) mm (maximum protruding portion included)
• Weight: 3.4kg