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NoZzer
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Jul 27, 2021

L1 . Bass amp

Hi have 2 L1 compact systems that I use for my Roland TDX7 drum kit and I want to add a L1 Bass bin that has no amp in it. 
I have a Rolls tiny crossover , what do you suggest I power the bass amp with 

thanks 

 

 

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Fish-54
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Aug 1, 2010

Re: L1 . Bass amp

Hello NoZzer,

 

You don't mention which L1 Bass speaker you have, the B1 or B2.

 

The B1 has two 6" woofers, weighs 25.1 pounds (11.4 kg), and measures 15"H x 10.25"W x 17.75"D (38 cm x 26 cm x 45 cm).

 

The B2 has two 10" woofers, weighs 45 pounds, and measures 23.4"H x 13.31"W x 18.9"D (59.4 cm x 33.8 cm x 48 cm).  It has a +/Normal/- "Bass Level" switch on the rear, to change voicing when used with an L1 Model II or 1S system.  This switch only signals a Model II or 1S to send a particular EQ curve to its "Bass Module Out" jack; the switch is ignored with any other system.

 

The B1 is an 8 ohm speaker, rated at 125 watts (250W at 4 ohms if you connect two in parallel); the B2 is a 4 ohm speaker, rated at 250 watts.  These speakers are designed to be used with the L1 systems, and as such, have no protection circuits built-in (protection is provided by the L1.)

 

For more information and speaker specs, see these pages:

B1 Bass Module

B2 Bass Module

 

To answer your question directly, I have no specific recommendation.  Just use a standard audio power amp rated at about 125 watts into 8 Ohms or 250 watts into 4 Ohms.  Remember, there is no protection in either speaker, so the risk of damage is greater than with other bass speakers.  Both speakers systems were optimized for frequency response from 40Hz-200Hz, so set your crossover accordingly.  (It will reproduce higher and lower frequencies, but they won't be as loud -- and will challenge the speaker's capabilities),

 

Does that help?