Recording/playback and 2 W audio power amplifier TDA1016

GENERAL DESCRIPTION:

The TDA1016 is a monolithic integrated audio power amplifier, preamplifier and A.L.C. circuit designed for applications in radio-recorders and recorders. The wide supply voltage range makes this circuit very suitable for d.c. and a.c. apparatus. The circuit incorporates the following features:

Features:

• Power amplifier/monitor amplifier
• Preamplifier/record and playback amplifier
• Automatic Level Control (A.L.C.) circuit
• Voltage stabilizer
• Short-circuit (up to 12 V a.c.) and thermal protection

Circuit diagram:

Recording/playback and 2 W audio power amplifier TDA1016

Triple amplifier circuit TDA7497

Amplifier Description

The TDA7497 is a triple 10+10+10W/15W class AB power amplifier assembled in the @ Multiwatt 15 package, specially designed for high quality sound, TV applications. Features of the TDA7497 include mute functions, independently controller for main and center channels.

Circuit Diagram

TDA7497 circuit diagram

Datasheet for TDA7497: Download

How To Build A Subwoofer Box

How to Design a Subwoofer Box

In this video I teach you how to design a subwoofer enclosure box using some of the leading design software. I also show you what math equations to use and how to design using a variable dimension for one of the sides of your sub enclosure. This can be used for speakers as well. Then you just need to build, grab an amplifier and your flexing away!

Youtube channel: CarAudioFabrication.

How to Match a Car Subwoofer and Amplifier

Need help knowing how to match a car subwoofer and amplifier? Tired of your friends constantly asking you to pair a sub and amp for them? Watch this video (or send it to a friend) and learn about the three major points of matching subwoofers and amps:

• The Total RMS of the System
• The Final Impedance of the System
• Types of Amplifiers

In this video we use the 750 watts RMS Kicker CVX (CompVX) subwoofer and the Kicker ZX750.1 amplifier (750 watts RMS @ 2 ohm) as an example of a perfectly matched subwoofer and amp.

Subwoofer Design Software

Bandpass Designer Software calculates 4th order bandpass theoretical enclosures and boxes.

Download >>

Input Parameters:

The following Theile Small speaker parameters are required for input. These values should be included with your speaker manual or can be found on the manufacture's web site. 

• Qts -  Total Q of the speaker
• Qes - Speaker electrical Q
• Fs - Free air resonance of speaker in Hz
• Vas - Volume of air equal to the speakers spring characteristics in liters
• Pmax - Maximum power of the driver in watts
• Diameter - The diameter of the driver in cm
• Xmax - The amount of cone movement in one direction in mm
• Dp - Diameter of the port(s) in cm
• Ports - Number of ports

The following speaker parameters are user defined inputs. These values should be inputted by user preference. 

Gain: dB increase of the system:

• S: Ripple
• S = 0.5 - Degraded response pronounced ripple
• S = 0.6 - Slightly degraded response slight ripple
• S = 0.7 - Best transient response no ripple

NOTES:

MAKE SURE THE UNITS MATCH (e.g. Vas is in liters not cubic feet).

Pmax, Diameter, and Xmax are not required for box calculation. They are used to determine the power response curve. Vf, Vr, Fl, Fh, Fb, and Lp will still be valid for Qts, Qes, Vas, Dp and number of Ports.

Ported designs require tuning. Bandpass Designer should give a good approximation of box parameters for most applications.

Use the largest diameter port as the design allows. Drivers greater than 10" in diameter can produce port noise due to the air movement.

Calculated Parameters

The following speaker box and enclosure parameters are calculated:

• Vf: Internal volume of front chamber (port goes into this chamber) in liters.
• Vr: Internal volume of rear chamber (sealed) in liters.
• Fb: Box resonance in Hz
• Fl: -3 dB frequency for the low end roll off
• Fh: -3 dB frequency for the high end roll off
• Lp: Length of port(s) in cm

Sealed Designer Software is for designing sealed or closed theoretical enclosures:

Download >>

Input Parameters:

The following speaker Theile Small parameters are required for input. These values, except Qtc, should be included with your speaker manuals or on the manufactures web site. 

• Qtc: Total Q of the speaker and box
• Qts: Total Q of the speaker
• Qes: Speaker electrical Q
• Fs: Free air resonance of speaker in Hz
• Vas: Volume of air equal to the speakers spring characteristics in liters
• Pmax: Maximum power of the driver in watts
• Diameter: The diameter of the driver in cm
• Xmax: The amount of cone movement in one direction in mm

Vented Designer Software is for designing vented or ported theoretical enclosures.

Download >>

Input Parameters: The following Theile Small speaker parameters are user defined inputs. These values should be inputted by user preference. Alignment: Choose desired alignment: SBB4: Good response, Large enclosure, Low tuning frequency QB3: Slightly degraded response, Small enclosure, Lower F3 SC4: Degraded response, Large enclosure, Low tuning frequency

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