Connecting these (5 ohm) with my speakers (4 ohm) will drop the overall impedance below what is recommended for my amp - no?

This does not pose an impedance issue as the high frequencies do not require much power from the amp.

These are 5 ohm my system is set up for 8 ohms. Will these hurt my reciever

Thank you for your question! The super tweeters have a very minimal draw on the amplifier being all high frequency, so your receiver should be just fine :) If you'd like to double check compatibility of your speakers, you can contact Aperion Audio directly and the customer service team will help you out!

Since this has a builtin cross over, why do you recommend NOT to connect directly to the amp?

These speakers are made to enhance the higher frequencies of your existing speakers. Why would you want to connect to your amp alone and run more wiring? It would be redundant and a waste of your money.

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Aperion Audio PST MKII Planar-Ribbon Super Tweeter Pair for Home Theater Stereo Speaker HiFi Audiophile Ultra High-End Frequency Response up to 40kHz (Gloss Black)

Product ID: 741063639

Details

Audio output mode
Stereo
Brand
Aperion Audio
Connectivity technology
RCA
Frequency response
40 KHz
Material
Wood
Model name
PST Super

🎧Ultra-high 40kHz frequency response

🖤Gloss black finish for sleek aesthetics

🎛️Planar-ribbon tech for crystal clarity

Description

🎶 Hear What Others Miss – Unlock Ultra-High Fidelity

ELEVATE YOUR SOUNDSCAPE - Experience ultra-high frequencies up to 40kHz for pristine audio detail beyond standard limits.
EXPAND YOUR STEREO FIELD - Widen and deepen your soundstage, immersing you in a richer, more dynamic listening experience.
SEAMLESS SPEAKER SYNERGY - Designed to blend effortlessly with your existing home theater or stereo setup, enhancing without overpowering.
SLEEK GLOSS BLACK ELEGANCE - Modern, minimalist finish that complements any high-end audio system and living space.
PRECISION PLANAR RIBBON DESIGN - Advanced planar-ribbon drivers deliver crisp, bright highs with minimal distortion for audiophile-grade clarity.

The PST MKII Planar-Ribbon Super Tweeter Pair is a premium audio accessory designed for audiophiles and home theater enthusiasts seeking to extend their system’s frequency response up to 40kHz. Featuring advanced planar-ribbon technology and a sleek gloss black finish, these super tweeters seamlessly integrate with existing speakers to enhance high-frequency detail, expand the stereo sound field, and deliver a refined, immersive listening experience.

Specifications

ASIN	B07NPDBVR4
Age Range Description	Adult
Antenna Location	For Home Stereo Setup, For Home Theater System
Audio Driver Type	Planar Magnetic Driver
Audio Output Mode	Stereo
Best Sellers Rank	112,592 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 284 in Bookshelf Hi-Fi Speakers
Box Contents	Manual x One (1) Pcs, Planar Ribbon Super Tweeter Speakers x Two (2) Pcs
Brand Name	Aperion Audio
Colour	Gloss Black
Compatible Devices	HiFi Speakers, Home Stereo Sound System, Home Theater
Connectivity Protocol	Wi-Fi
Control Method	Touch
Controller Type	Corded electric
Customer Reviews	4.1 4.1 out of 5 stars (55)
Enclosure Material	Wood
Frequency Response	40 KHz
Impedance	6 Ohms
Is Electric	No
Is Waterproof	False
Item Dimensions D x W x H	12.7D x 10.2W x 13.4H centimetres
Item Type Name	Speaker
Item Weight	1.65 Pounds
MP3 player	No
Manufacturer	Aperion Audio
Maximum Speaker Output Power (in watts)	75 Watts
Model Name	PST Super Tweeter
Model Number	PST-2PK-GBP
Mounting Type	Set top on the speaker
Network Connectivity Technology	RCA
Number of Audio Channels	2.0
Number of Items	2
Power Source	Corded Electric
Product Features	Super Tweeter Speaker
Speaker Size	15.24 Centimetres
Speaker Type	Tweeter
Specific Uses For Product	home audio systems, stereo setups, home theaters, desktop audio systems
Tweeter Diameter	1 Inches
UPC	817968003062
Unit Count	1.0 count
Water Resistance Level	Not Water Resistant
Wireless Technology Type	Wi-Fi

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