- #Altec lansing atp3 spec drivers#
- #Altec lansing atp3 spec driver#
- #Altec lansing atp3 spec plus#
- #Altec lansing atp3 spec series#
#Altec lansing atp3 spec drivers#
Audio Electronics Repair also switched-out the Altec 806-8A drivers with Altec 902-8Bs. Their dividing networks had been replaced with bi-amp plates with five-way binding posts. A few weeks later they came back looking as if they had just left the Altec factory. We sent them over to Audio Electronics Repair for restoration, and a few modifications that made them more acceptable for our testing purposes. High/Mid Frequency Horn Model: Altec H-811BĪs is usually the case with vintage speakers, our Valencias needed a little TLC. After reading this article they may have to re-think what they thought was impossible. Many Altec Model 19 fans will immediately point-out the differences between these two loudspeaker system, and claim that it’s not possible to make a Valencia perform like a Model 19. For our testing purposes we chose the 846B due to its impedance, and that it was a tuned port enclosure. There were two versions of the Valencia: the 846A and 846B. It shares many similarities with the newer and larger Model 19. As a resui:, the actual power delivered to load is 184.1 watts (192.2 watr minus 8.1 watts).The Altec-Lansing Valencia 846B is an American audio classic that inspired the development of the legendary Model 19. squaring the voltage and dividinr by the load impedance (40^ divl ed by 8.3264 ohms). At the 8, rated output power, the outpu voltage is 40 V rms.
#Altec lansing atp3 spec plus#
installer uses 160 feet of 10 GA wire cable with an 8 fl speai ĭoes this mean that whenever amplifier produces 200 wattr output power, 191.9 watts (20^ watts minus 8.1 watts) will Ы delivered to the 8 ohm load? NOI Tire actual load impedance is ohms plus the resistance of t cable (0.00204 ohms/foot thu' 160 feet) for a total load imp dance of 8.3264 ohms. Power loss in the speaker cable, multiply the power loss per Го (or meter) of the 2-wire cal selected from Teible I Ьз' и» length of the cable in feet meters). Table I rīeen assembled to enable yoi calculate the power losses in e speaker cable.ģ.4.1 Calculating Powe Losses with 8 ob^ Loads Ibis can add coloration a muddiness to the sound. waste power and reduce the dam ping factor at the sp>eaker ter t- Lnals. Refer to Figure 1 for the exact screw locations.ģ.4 Output Cable Select I^: ft'.
In addition, you must remove the two iimermost screws inset into the top bumper strip.
There are three screws on each side and three along the top-rear edge of the chassis. Remove and save the ele ven screws securing the top cover. Make sure the amplifier is not connected to any po wer source.Ģ. Use the following pro cedures to re-strap the primary of the power transformer for 220/240 V ac applications.ġ.
#Altec lansing atp3 spec series#
The power transformer has two 120 volt primary windings which can be connected in paraDel for 120 V ac line voltages, or in series to meet 220/240 V ac requi rements. WARNING: Verify that the power transformer’s primary circuit configuration is correct for the intended ac line voltage BEFORE applying power to the amplifier.ġ.2 220/240 V ac, 50/60 Hz Power Connections Refer to Figure 2a for the wiring details. The amplifier is provided with the primary of the power tra nsformer strapped for 120 V ac operation from the factory. The next two sections refer to the first model with the dual 120 V ac pri mary windings. The ot her amplifier model is for export into countries where the ac line voltage is 100 volts, 50/60 Hz. These windings may be wired in parallel or series for operation at either 120 V ac or 220/240 V ac.
One model has a 50/60 Hz power transformer with two 120 V ac primary windings. Trimpot Adjustments.Įquipment Needed.Īdjusting R39, the LF Cancel Trimpot.Īdjusting R26, the BIAS Trimpot.Īdjusting R23 and R24, the Negative and Positive Current Limit Trimpots.Ĭhecking the Short Circuit Current. OPERATION.ĭual Mode of Operation.īridge Mode of Operation. Load Protection Circuitry.Īmplifier Protection Circuitry.
#Altec lansing atp3 spec driver#
Output Cable Selection.ģ.4.1 Calculating Power Losses with 8 ohm Loads.ģ.4.2 Calculating Power Losses with 4 ohm Loads.ĭamping Factor.ģ.5.1 Calculating the Maximum Length of Cable for a Specified Damping Factor.ģ.6 Speaker Protection Fuse Selection.ģ.7 Compression Driver Protection Capacitors. Operating and Service Instructions for the Altec Lansing 9444B Power Amplifierġ ELECTRICAL.ġ.1 120 V ac, 50/60 Hz Power Connections.ġ.2 220/240 V ac, 50/60 Hz Power Connections.Ģ INSTALLATION.Ģ.1 Rack Mounting.