Lubell Audio Isolation Transformer Boxes
The Lubell Labs 20 volt LL9816 and
LL916 underwater speakers must be connected to a Lubell Labs
transformer box,
which in turn connects to a Lubell Labs approved UL listed amplifier of
the correct power and impedance rating.
The transformer box and amplifier must be kept in a dry air conditioned
area, and AC operated amplifiers must be connected to a GFCI protected
AC outlet.
Lubell Labs die-cast transformer boxes provide electrical isolation of the underwater speaker from the amplifier for safety, impedance matching for proper amplifier operation, and a circuit that both limits current and flattens the frequency response during broadband operation (music, pink noise, etc.). When connected to amplifier of designated wattage and impedance, the output of the transformer boxes will not exceed 20 Vrms @ 3.0A at full drive, and each underwater speaker will produce maximum sound pressure level of 180dB/uPa/m @ 1kHz. A variety of transformer boxes are made to provide compatibilty with existing or custom sound systems. Splitting transformer boxes are offered to allow connection of an air and underwater speaker to an amplifier or sound system.
Model AC102 (connectors for portable use) 50 watts, 32 ohm load, 40 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Useful for connecting up to four Lubell LL9816 or LL916 underwater speakers to a 150 - 200 watt mono amp, or up to eight Lubell's to a 150 - 200 watt stereo amp. Connect AC102 inputs in parallel and in phase only. Connect one U/W speaker per box. Amplifier must have unbalanced output -- no bridged amplifiers! Connect amplifier to GFCI only!
Also useful for piggybacking an underwater speaker on to one or both channels of a 150 - 200 watt stereo PA system that has one 8 ohm air speaker connected to each channel.
Model AC201CXA (connectors for portable use) 50 watts, 2 ohm load, 10 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
For connection to the 2 ohm Anchor Explorer Pro EXP-6000 only.
Model AC202B (Screw terminal for contractor install) 50 watts, 8 ohm load, 20 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Used for connecting one underwater speaker to the 8 ohm tap of PA amplifiers not exceeding 50 watts @ 8 ohms (20 Vrms).
Model AC202C (connectors for portable use) 50 watts, 8 ohm load, 20 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Used for connecting one underwater speaker to the "SWITCHED or UNSWITCHED EXTERNAL SPEAKER" jack of the Chiayo Victory or PASO Soundcaster 150.
Model
AC205B (Screw terminal for contractor install) 37.5 watts, 16
ohm load, 25 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Connects to 25V speaker output of following commercial sound amplifiers:
One speaker - Peavey UMA352 or PVi4B, Bogan C60, TOA BG-1060, InterM A-60
Two speakers - Peavey IPA752
Three speakers - Peavey IPA/UMA1502, TOA BG-2120
Four speakers - Peavey IPA/UMA1502
Five - six speakers - TOA P-924MKII, A724
Eight speakers - Peavey IPA300T
Model
AC205C (connectors for portable use) 37.5 watts, 16 ohm load, 25 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Connects to 25V speaker output of following commercial sound amplifiers:
One speaker - Peavey UMA352 or PVi4B, Bogan C60, TOA BG-1060, InterM A-60
Two speakers - Peavey IPA/UMA752, Bogan C100
Three speakers - Peavey IPA/UMA1502
Four speakers - Peavey IPA/UMA1502
Five - six speakers - TOA P-924MKII, A724
Eight speakers - Peavey IPA300T
Model AC203E Circuit Master 78 watts, 8 ohm load, 25 Vrms
5.75" x 4.625" x 2.5", 2.75 lbs.
Allows connection of one Lubell LL9816 or LL916 underwater speaker AND one SX80 or Quadra10 eight ohm air speaker to a mono PA amplifier not exceeding 80 watts rms @ 8 ohms, such as the Peavey MP400, Peavey PVi 4B, Fender PD-150, Fender Squire. 25V compatible (78Wmin) -- may be used with Bogan C100, InterM A-120, Peavey UMA752, TOA BG-1120, others. Operation: First sound level of underwater speaker is set using master volume control on amplifier. Then sound level of air speaker is set using volume control on the AC203E Circuit Master. Once this perfect balance between air and underwater sound levels is set, then the amplifier master volume control alone is used to control overall sound levels.
Model AC211 Circuit Master 200 watts, 10.6 ohms, 40 Vrms
5.75" x 4.625" x 2.5", 2.75 lbs.
Allows connection of one Lubell LL9816 or LL916 underwater speaker AND one 8 ohm PA speaker (Quadra 10 or 12 recommended) to one or both channels of a portable mono or stereo PA system rated between 150 - 200 watts rms @ 8 ohms per channel. Operation: First sound level of underwater speaker is set using master volume control on amplifier. Then sound level of air speaker is set using volume control on the AC203E Circuit Master. Once this perfect balance between air and underwater sound levels is set, then the amplifier master volume control alone is used to control overall sound levels.
Lubell Labs die-cast transformer boxes provide electrical isolation of the underwater speaker from the amplifier for safety, impedance matching for proper amplifier operation, and a circuit that both limits current and flattens the frequency response during broadband operation (music, pink noise, etc.). When connected to amplifier of designated wattage and impedance, the output of the transformer boxes will not exceed 20 Vrms @ 3.0A at full drive, and each underwater speaker will produce maximum sound pressure level of 180dB/uPa/m @ 1kHz. A variety of transformer boxes are made to provide compatibilty with existing or custom sound systems. Splitting transformer boxes are offered to allow connection of an air and underwater speaker to an amplifier or sound system.
Model AC102 (connectors for portable use) 50 watts, 32 ohm load, 40 Vrms5.5" x 3.75" x 2.5", 2.25 lbs
Useful for connecting up to four Lubell LL9816 or LL916 underwater speakers to a 150 - 200 watt mono amp, or up to eight Lubell's to a 150 - 200 watt stereo amp. Connect AC102 inputs in parallel and in phase only. Connect one U/W speaker per box. Amplifier must have unbalanced output -- no bridged amplifiers! Connect amplifier to GFCI only!
Also useful for piggybacking an underwater speaker on to one or both channels of a 150 - 200 watt stereo PA system that has one 8 ohm air speaker connected to each channel.
Model AC201CXA (connectors for portable use) 50 watts, 2 ohm load, 10 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
For connection to the 2 ohm Anchor Explorer Pro EXP-6000 only.
Model AC202B (Screw terminal for contractor install) 50 watts, 8 ohm load, 20 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Used for connecting one underwater speaker to the 8 ohm tap of PA amplifiers not exceeding 50 watts @ 8 ohms (20 Vrms).
Model AC202C (connectors for portable use) 50 watts, 8 ohm load, 20 Vrms
5.5" x 3.75" x 2.5", 2.25 lbs
Used for connecting one underwater speaker to the "SWITCHED or UNSWITCHED EXTERNAL SPEAKER" jack of the Chiayo Victory or PASO Soundcaster 150.
Model
AC205B (Screw terminal for contractor install) 37.5 watts, 16
ohm load, 25 Vrms5.5" x 3.75" x 2.5", 2.25 lbs
Connects to 25V speaker output of following commercial sound amplifiers:
One speaker - Peavey UMA352 or PVi4B, Bogan C60, TOA BG-1060, InterM A-60
Two speakers - Peavey IPA752
Three speakers - Peavey IPA/UMA1502, TOA BG-2120
Four speakers - Peavey IPA/UMA1502
Five - six speakers - TOA P-924MKII, A724
Eight speakers - Peavey IPA300T
Model
AC205C (connectors for portable use) 37.5 watts, 16 ohm load, 25 Vrms5.5" x 3.75" x 2.5", 2.25 lbs
Connects to 25V speaker output of following commercial sound amplifiers:
One speaker - Peavey UMA352 or PVi4B, Bogan C60, TOA BG-1060, InterM A-60
Two speakers - Peavey IPA/UMA752, Bogan C100
Three speakers - Peavey IPA/UMA1502
Four speakers - Peavey IPA/UMA1502
Five - six speakers - TOA P-924MKII, A724
Eight speakers - Peavey IPA300T
Model AC203E Circuit Master 78 watts, 8 ohm load, 25 Vrms
5.75" x 4.625" x 2.5", 2.75 lbs.
Allows connection of one Lubell LL9816 or LL916 underwater speaker AND one SX80 or Quadra10 eight ohm air speaker to a mono PA amplifier not exceeding 80 watts rms @ 8 ohms, such as the Peavey MP400, Peavey PVi 4B, Fender PD-150, Fender Squire. 25V compatible (78Wmin) -- may be used with Bogan C100, InterM A-120, Peavey UMA752, TOA BG-1120, others. Operation: First sound level of underwater speaker is set using master volume control on amplifier. Then sound level of air speaker is set using volume control on the AC203E Circuit Master. Once this perfect balance between air and underwater sound levels is set, then the amplifier master volume control alone is used to control overall sound levels.
Model AC211 Circuit Master 200 watts, 10.6 ohms, 40 Vrms
5.75" x 4.625" x 2.5", 2.75 lbs.
Allows connection of one Lubell LL9816 or LL916 underwater speaker AND one 8 ohm PA speaker (Quadra 10 or 12 recommended) to one or both channels of a portable mono or stereo PA system rated between 150 - 200 watts rms @ 8 ohms per channel. Operation: First sound level of underwater speaker is set using master volume control on amplifier. Then sound level of air speaker is set using volume control on the AC203E Circuit Master. Once this perfect balance between air and underwater sound levels is set, then the amplifier master volume control alone is used to control overall sound levels.