GENELEC 1235A

Product overview

The GENELEC 1235A brings the sound and heritage of the iconic GENELEC 1035 into the modern recording age: high SPL capability and precise imaging in a main monitor that adapts to your room.

Two 380 mm woofers, two 130 mm midrange drivers and a 50 mm compression driver into a 25 mm throat work with 96 kHz processing and Smart Active Monitoring. The rotatable DCW allows horizontal or vertical mounting, and the outstanding on- and off-axis response gives a very wide, stable sweet spot that several listeners can trust. The RAM-XL rack amplifier delivers 2 x 1000 W, 2 x 400 W and 250 W.

Key features

• Heritage of the 1035 with 96 kHz processing and Smart Active Monitoring
• Drivers: 2 x 380 mm woofers, 2 x 130 mm midranges, 50 mm compression tweeter
• Rotatable DCW (±90°) for horizontal or vertical mounting
• 130 dB short-term SPL at 1 m; peak 136 dB per pair at 2 m
• 31 Hz - 20 kHz (±2 dB) response
• RAM-XL amplifier: 2 x 1000 W + 2 x 400 W + 250 W
• Analogue and AES/EBU inputs (up to 192 kHz) with AES/EBU thru
• GLM calibration with AutoCal, room compensation and level and delay alignment

Classic heritage

The original 1035 became the hallmark of prestigious studios that needed a wall-mountable full-range monitor with true reference performance at high SPL and long listening distances.

Cutting-edge performance

Superb directivity gives a very wide and stable sweet spot, and GLM configures, controls and calibrates the 1235A for any acoustic environment.

Remote RAM-XL amplifier

The individually calibrated RAM-XL is a 19-inch 3U rack unit with fan cooling; 10 m Speakon and RJ45 cables are included for the link to the enclosure with the same serial number.

In the box

• GENELEC 1235A monitor
• Individually calibrated RAM-XL amplifier unit
• Mains cable (1.8 m)
• RJ45 cable (5 m)
• RJ45 cable (10 m)
• 2 x four-pole Speakon cables (10 m)
• Allen key (for the DCW plate)
• Operating manual

GLM calibration uses the free GLM software with the GENELEC 9320A SAM Reference Controller or the GLM Calibration Kit (each available separately).

GENELEC 1235A: frequently asked questions

Is this the complete monitor?

Yes. This is the GENELEC 1235A complete monitor (part 1235AP): enclosure, individually calibrated RAM-XL amplifier and cables.

Can it be mounted horizontally?

Yes. The DCW rotates through ±90° for horizontal or vertical mounting.

What do I need for GLM calibration?

The free GLM software and a GENELEC 9320A SAM Reference Controller or GLM Calibration Kit (each available separately).

Where can I buy the GENELEC 1235A in India?

The GENELEC 1235A is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.

Workflow 1: Stereo main monitoring with GLM calibration

Set up a pair of 1235A monitors as the calibrated reference of a control room.

Connections

Setup

1. Place the monitors symmetrically with their acoustic axes aimed at the listening position.
2. Link the RAM-XL to its own enclosure (same serial number) with the two Speakon cables and the RJ45 LED cable.
3. Daisy-chain the CONTROL NETWORK sockets and end at the GLM adapter; place the measurement microphone at ear height.
4. Run GLM AutoCal, then store the settings in the monitors.

Tip: Keep the AES/EBU source level near 0 dBFS and lower the GLM level instead, to keep full digital resolution.

Workflow 2: Flush mounting in the front wall

Build the monitors into the wall to avoid edge diffraction and wall reflections.

Connections

Setup

1. Make the wall stiff and heavy and angle it so the monitors aim at the listener (tilt under 15 degrees).
2. Rotate the DCW so the midrange and tweeter align vertically (eight M5 screws, 4 mm Allen key).
3. Fit the facing panel flush with the enclosure and fill the gap with a soft rubber gasket.
4. Keep any cloth frame under 20 mm deep and acoustically transparent.

Tip: Plan the cable recess behind the enclosure: the Speakon connectors need about 100 mm.

Workflow 3: Machine room amplifiers

Keep amplifier heat and fan noise out of the control room.

Connections

Setup

1. Mount each amplifier in the rack with free air around it (RAM-XL: 100 mm free behind).
2. Run the 10 m Speakon and RJ45 cables; for longer runs use 2.0 mm² up to 30 m, 3.3 mm² up to 40 m, 5.3 mm² up to 60 m.
3. Turn each Speakon connector clockwise until it locks.
4. Network the amplifiers last in the GLM chain if they are in the machine room.

Tip: Never mix amplifier and enclosure pairs: each amplifier is calibrated for its own enclosure.

Workflow 4: Surround and immersive systems

Use the monitors as the main channels of a 5.1 or immersive system.

Connections

Setup

1. Place the monitors according to ITU-R BS.775-1 for 5-channel work.
2. Assign each monitor's AES/EBU subframe (A or B) in GLM.
3. Measure all monitors and subwoofers together with GLM.
4. Store the settings or keep the computer connected for control.

Tip: One AES/EBU line can feed up to four SAM units through the DIGITAL THRU connectors.

Workflow 5: Broadcast and post production without a computer

Run calibrated monitors in a facility where no computer stays connected.

Connections

Setup

1. Calibrate the system with GLM.
2. Use Store the Settings to write the setup into the monitors.
3. Disconnect the computer; the monitors keep their calibration.
4. Switch on ISS in GLM if the monitors should go to standby when idle.

Tip: Watch the front light: red means overload or an AES/EBU data error; turn the source down.

Workflow 6: Mastering and critical listening

Make final decisions on a neutral, low-distortion reference.

Connections

Setup

1. Place the monitors symmetrically at equal distance from the listening position.
2. Calibrate with GLM and check the level alignment.
3. Set the input sensitivity in GLM for a comfortable working level.
4. Keep symmetrical reflective surfaces around the listening position.

Tip: These monitors can exceed 85 dB SPL: protect your hearing in long sessions.