CLOSER ACOUSTICS BLOCKS: A MODULAR LOUDSPEAKER SYSTEM

Closer Acoustics Blocks is a modular loudspeaker system designed to offer flexibility in sound tuning, accommodating different room acoustics, amplifier types, and listener preferences.

The Closer Acoustics Blocks system builds upon the company’s experience with wide-band driver loudspeakers and includes existing models, such as OGY and BOB (Bass Open Baffle) modules. The latest addition to the lineup is OKHO, the central component of the new modular system. The speakers can be assembled in a mix-and-match style according to the customers sound preferences.

OKHO: THE CENTREPIECE OF THE CLOSER ACOUSTICS BLOCKS SYSTEM

OKHO features a 12” wide-band driver, similar to the unit found in Closer Acoustics’ flagship Vigo speaker. Designed to work in conjunction with at least one pair of BOBs, OKHO can be integrated into a modular stack to optimise sound performance. To ensure the speaker is positioned at ear level, Closer Acoustics has introduced the Blank, a structurally identical but voided version of the BOB cabinet. This standardised sizing allows for a range of configurations to suit individual listening environments.

CONFIGURATION OPTIONS FOR OPTIMISED SOUND

Listeners can assemble the system in various configurations, including:

Blank – BOB – OKHO

BOB – Blank – OKHO

Blank – BOB – OKHO – BOB

Blank – BOB – BOB – OKHO

Each setup influences bass presentation differently. Placing a BOB closer to the floor enhances bass reinforcement while positioning it higher yields a cleaner response. For those seeking an even more substantial low-frequency foundation, an additional pair of BOBs can be integrated, reinforcing the 40-200Hz range without adding excessive boominess.

BOB MK II: REFINED DESIGN AND ENHANCED CONNECTIONS

BOB modules have undergone a revision with the introduction of the MK II version. The new design eliminates the internal BOB terminal, instead integrating an improved inductance coil directly onto the driver’s backplate. Pure copper binding terminals now accommodate spades, banana plugs, or bare wire, ensuring a high-quality connection. Wiring is achieved with 9.5 AWG pure copper Cardas wire, and custom jumpers made from the same material facilitate connections between BOBs and OKHO or OGY.

Read the HiFi PiG review of the Closer Acoustics OGY loudspeaker here…

OKHO VS. OGY: DIFFERENT SONIC SIGNATURES

Closer Acoustics has designed OKHO to be interchangeable with the existing OGY speaker within the modular system. While both models pair with BOB modules, their sonic characteristics differ significantly:

OKHO: 12” driver, 97.5 dB efficiency, 34Hz resonance. Offers a relaxed, full-bodied midrange and a spacious soundstage.

OGY: 4” driver, 91 dB efficiency, 50Hz resonance. Known for its speed, detail, and holographic imaging.

To balance efficiency differences, Closer Acoustics employs high-quality Pathaudio resistors in a constant impedance circuit. This attenuation can be bypassed via direct connection to the driver binding posts if desired.

CLOSER ACOUSTICS BLOCKS BUILD QUALITY AND ADDITIONAL FEATURES

The Blocks system is assembled on an anti-vibration platform equipped with ISO Acoustics GAIA II footers. Additionally, Closer Acoustics has responded to customer feedback by integrating acoustically transparent cloth on the back of the modules for dust protection. Brass pins prevent module slippage, ensuring a secure stack formation.

A CUSTOMISABLE, HIGH-PERFORMANCE LOUDSPEAKER SYSTEM

Closer Acoustics’ modular approach allows listeners to fine-tune their system to their preference and room characteristics. Whether opting for the fast, detailed presentation of OGY or the richer, more immersive sound of OKHO, the Blocks system provides flexibility without compromising audio integrity. With refined BOB MK II modules and a range of configuration options, Closer Acoustics continues its commitment to high-performance wide-band driver-based loudspeakers.

CLOSER ACOUSTICS BLOCKS SPECIFICATIONS

OKHO

Nominal Impedance – 8 Ohm

Power handling – 40 Watt

Efficiency – 91dB

BOB

Nominal Impedance – 8 Ohm

Power handling – 100 Watt

Efficiency – 94dB

OGY

Nominal Impedance – 8 Ohm

Power handling 15 Watt

Efficiency – 91dB

Combination (parallel connection)

BOB + OKHO – 4 Ohm

BOB + BOB + OKHO – 2,7 Ohm

BOB + BOB + OGY – 2,7 Ohm

Impedance – lowest point in the impedance 2 BOBs and OKHO – 2,2 Ohm at 85 Hz.

Power handling – General rule for power handling is directly connected to the primary monitor used. So if it is OKHO then max 40 Watts, if OGY 15 Watts.

CLOSER ACOUSTICS BLOCKS PRICING EXAMPLES

OGY from 1,594€ a pair

BOB from 2,883€ a pair

OKHO from 2,892€ a pair

Blank from 743€ a pair

Combinations from 5,912€ a pair‍

HiFi PiG Says: We are big fans of Closer Acoustics and have very much enjoyed their loudspeakers, this modular approach looks like a fantastic idea!