Live sound, installations
Two-channel; 750W per channel (4 ohms); three-mode operation; clip limiters; high-pass filters
Inter-M Americas at 610-874-8870,
Web Site.It seems like power amplifiers have, like so many other mass-produced products, attained a high level of reliability. Therefore, feature sets and pricing have become key factors in purchasing decisions.
Perhaps nowhere are features so plentiful and prices so low than from those products produced in Asia. Even some of the most trusted names in pro audio now manufacture most, if not all, of their products across the Pacific. To many one of the newest Far East players is a company called Inter-M but they’ve actually been around for more than 20 years making OEM equipment for other names. In 2002 they started making audio equipment under their own name and they (much to my surprise) make a whole range of pro audio gear. The L2400 is the flagship of the company’s four L series amps that range in power from 300 to 750 watts per side at 4 ohms.
The L2400 is a two rack-space affair that reaches 14.5 inches back into your rack and weighs in at 34.6 pounds. The front panel of the chassis is sleek and attractive with two beefy handles, level controls, a power switch, and LEDs for level, clip, protect, power and operation mode (stereo, parallel or bridged mono). The back of the L2400 is home to a circuit breaker, input connectors (an XLR and 1/4-inch combo connector and an XLR male pass through on each channel), speaker outputs (Speakon and binding post), a mode switch (stereo, parallel or bridged mono), a clip limiter, and a selectable high-pass filter (30 Hz or 50 Hz).
As mentioned, the Class H amp has a stated output power of 750 watts per side at 4 ohms (1 kHz both channels driven, 0.1% THD). THD is listed at <0.03% and damping factor is >400. The amp has a specified power consumption of 9A at 1/8 power (100-120VAC, both channels driven, 4 ohm load).
My first use of the 2400 was in a short-term install at a local film festival. The amp powered a pair of mid/high cabinets that were receiving signal above 120 Hz. Whether it was handling spoken word from actor Richard Dreyfus or pumping out late-night dance music, the L-2400 responded with clean, reliable power. Later, I used the amp to power some delay speakers at a rally for former presidential candidate and current Democratic National Committee Chairman Howard Dean (no, he didn’t scream and yes, I did have a limiter in place just in case he did).
Like so many amps on the market today, the L-2400 proved competent and reliable for all the uses in which I engaged it. I found the L-2400 to be well designed with very functional adornments that were easy to use and enable. I particularly liked the XLR jumpers on the input connectors. The HPF and limiter were easy to activate (no miniscule switches or recessed pushbuttons) but that can be a double-edged sword if the amp would be subject to tampering from unknowledgeable users.
With their efficiency and reduced weight, I am a big proponent of switch-mode amplifiers but I must say that I enjoyed using the class H L-2400. At roughly 35 pounds, it is far from light but it’s still manageable and it is somewhat thrifty. It is a smartly designed amp that would be well suited to clubs, worship houses, schools and even some touring applications. At $1,050 it is squarely in the lower end of the price spectrum for an amp with this much power and as many features, making it a great bargain.