ElectroSuite.com – Parametric MID Frequence EQ, made up of 2 units in the series : Classic unit Bass/Treble and Parametric unit of mid frequencies.
Parametric MID Frequence EQ – users.otenet.gr
ElectroSuite.com – 100W Guitar Amplifier Mk II.
This is PreAmplifier Equalizer using IC TL074 Electro Suite, front of the amplifier is done by the Op-Amp A1, A1 is actually reinforcing a time, with the intention of utilizing the high input impedance, about the size of 1M.
Setting the tone carried by the op-amp A2 which also acts as an amplifier with positive feedback, divided by two, partly channeled into a series of R1, R2, C2, C3, and Pot2 to adjust the gain of low frequency (bass), and some routed to the circuit C4, C5, and Pot3 to adjust the gain of high frequency (treble). Furthermore, R3 and R4 are mixing to form a positive feedback loop earlier. Frequency setting like this is a frequency filter theory Baxandall, can be regarded as the audio standard to date. The use of IC op-amp TLO74, because this component is very cheap and easily available, and most importantly, this IC uses a JFET at its input lines and a high slew-rate. With this circuit we can enjoy the stability of low tone Bass, agility tone middle (Mid), and high-pitch of Treble.
Source : Komputek | e-one-s
This is 10W Audio Amplifier Bass Boost electro suite, as an amplifier, this circuit also uses a number of frequencies to drive the loudspeaker, the amount of bass frequencies will be reduced. Therefore, it needs to be installed on a bass-boost control fedback loop amplifier, this is done to address the decline in quality. Graph bass can reach a maximum at +16.4 dB @ 50Hz.
Adjust the volume control at minimum position and R3 with a minimum value of resistance as well. Try to activate the circuit and adjust R3 to read a current of about 20mA to 25mA. Wait for 15 minutes, connect the ground at J1, P1, C2, C3 and C4. Connect also C9 at the output ground.
This circuit can be connected directly to a CD player, tuner and tape recorder. Q3 and Q4 must be installed with the heatsink.
Source : Komputek edition 283 via e-one-s